--- /dev/null
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2013 Inktank Storage, Inc.
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public
+ * License version 2, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#include "json_spirit/json_spirit.h"
+#include "common/debug.h"
+
+using namespace std;
+
+/**
+ * Given a cmddesc like "foo baz name=bar,type=CephString",
+ * return the prefix "foo baz".
+ */
+std::string cmddesc_get_prefix(const std::string &cmddesc)
+{
+ stringstream ss(cmddesc);
+ std::string word;
+ std::ostringstream result;
+ bool first = true;
+ while (std::getline(ss, word, ' ')) {
+ if (word.find_first_of(",=") != string::npos) {
+ break;
+ }
+
+ if (!first) {
+ result << " ";
+ }
+ result << word;
+ first = false;
+ }
+
+ return result.str();
+}
+
+/**
+ * Read a command description list out of cmd, and dump it to f.
+ * A signature description is a set of space-separated words;
+ * see MonCommands.h for more info.
+ */
+
+void
+dump_cmd_to_json(Formatter *f, const string& cmd)
+{
+ // put whole command signature in an already-opened container
+ // elements are: "name", meaning "the typeless name that means a literal"
+ // an object {} with key:value pairs representing an argument
+
+ stringstream ss(cmd);
+ std::string word;
+
+ while (std::getline(ss, word, ' ')) {
+ // if no , or =, must be a plain word to put out
+ if (word.find_first_of(",=") == string::npos) {
+ f->dump_string("arg", word);
+ continue;
+ }
+ // Snarf up all the key=val,key=val pairs, put 'em in a dict.
+ // no '=val' implies '=True'.
+ std::stringstream argdesc(word);
+ std::string keyval;
+ std::map<std::string, std::string>desckv;
+ // accumulate descriptor keywords in desckv
+
+ while (std::getline(argdesc, keyval, ',')) {
+ // key=value; key by itself implies value is bool true
+ // name="name" means arg dict will be titled 'name'
+ size_t pos = keyval.find('=');
+ std::string key, val;
+ if (pos != std::string::npos) {
+ key = keyval.substr(0, pos);
+ val = keyval.substr(pos+1);
+ } else {
+ key = keyval;
+ val = true;
+ }
+ desckv.insert(std::pair<std::string, std::string> (key, val));
+ }
+ // name the individual desc object based on the name key
+ f->open_object_section(desckv["name"].c_str());
+ // dump all the keys including name into the array
+ for (std::map<std::string, std::string>::iterator it = desckv.begin();
+ it != desckv.end(); ++it) {
+ f->dump_string(it->first.c_str(), it->second);
+ }
+ f->close_section(); // attribute object for individual desc
+ }
+}
+
+void
+dump_cmd_and_help_to_json(Formatter *jf,
+ const string& secname,
+ const string& cmdsig,
+ const string& helptext)
+{
+ jf->open_object_section(secname.c_str());
+ jf->open_array_section("sig");
+ dump_cmd_to_json(jf, cmdsig);
+ jf->close_section(); // sig array
+ jf->dump_string("help", helptext.c_str());
+ jf->close_section(); // cmd
+}
+
+void
+dump_cmddesc_to_json(Formatter *jf,
+ const string& secname,
+ const string& cmdsig,
+ const string& helptext,
+ const string& module,
+ const string& perm,
+ const string& avail,
+ uint64_t flags)
+{
+ jf->open_object_section(secname.c_str());
+ jf->open_array_section("sig");
+ dump_cmd_to_json(jf, cmdsig);
+ jf->close_section(); // sig array
+ jf->dump_string("help", helptext.c_str());
+ jf->dump_string("module", module.c_str());
+ jf->dump_string("perm", perm.c_str());
+ jf->dump_string("avail", avail.c_str());
+ jf->dump_int("flags", flags);
+ jf->close_section(); // cmd
+}
+
+void cmdmap_dump(const cmdmap_t &cmdmap, Formatter *f)
+{
+ assert(f != nullptr);
+
+ class dump_visitor : public boost::static_visitor<void>
+ {
+ Formatter *f;
+ std::string const &key;
+ public:
+ dump_visitor(Formatter *f_, std::string const &key_)
+ : f(f_), key(key_)
+ {
+ }
+
+ void operator()(const std::string &operand) const
+ {
+ f->dump_string(key.c_str(), operand);
+ }
+
+ void operator()(const bool &operand) const
+ {
+ f->dump_bool(key.c_str(), operand);
+ }
+
+ void operator()(const int64_t &operand) const
+ {
+ f->dump_int(key.c_str(), operand);
+ }
+
+ void operator()(const double &operand) const
+ {
+ f->dump_float(key.c_str(), operand);
+ }
+
+ void operator()(const std::vector<std::string> &operand) const
+ {
+ f->open_array_section(key.c_str());
+ for (const auto i : operand) {
+ f->dump_string("item", i);
+ }
+ f->close_section();
+ }
+
+ void operator()(const std::vector<int64_t> &operand) const
+ {
+ f->open_array_section(key.c_str());
+ for (const auto i : operand) {
+ f->dump_int("item", i);
+ }
+ f->close_section();
+ }
+
+ void operator()(const std::vector<double> &operand) const
+ {
+ f->open_array_section(key.c_str());
+ for (const auto i : operand) {
+ f->dump_float("item", i);
+ }
+ f->close_section();
+ }
+ };
+
+ //f->open_object_section("cmdmap");
+ for (const auto &i : cmdmap) {
+ boost::apply_visitor(dump_visitor(f, i.first), i.second);
+ }
+ //f->close_section();
+}
+
+
+/** Parse JSON in vector cmd into a map from field to map of values
+ * (use mValue/mObject)
+ * 'cmd' should not disappear over lifetime of map
+ * 'mapp' points to the caller's map
+ * 'ss' captures any errors during JSON parsing; if function returns
+ * false, ss is valid */
+
+bool
+cmdmap_from_json(vector<string> cmd, map<string, cmd_vartype> *mapp, stringstream &ss)
+{
+ json_spirit::mValue v;
+
+ string fullcmd;
+ // First, join all cmd strings
+ for (vector<string>::iterator it = cmd.begin();
+ it != cmd.end(); ++it)
+ fullcmd += *it;
+
+ try {
+ if (!json_spirit::read(fullcmd, v))
+ throw runtime_error("unparseable JSON " + fullcmd);
+ if (v.type() != json_spirit::obj_type)
+ throw(runtime_error("not JSON object " + fullcmd));
+
+ // allocate new mObject (map) to return
+ // make sure all contents are simple types (not arrays or objects)
+ json_spirit::mObject o = v.get_obj();
+ for (map<string, json_spirit::mValue>::iterator it = o.begin();
+ it != o.end(); ++it) {
+
+ // ok, marshal it into our string->cmd_vartype map, or throw an
+ // exception if it's not a simple datatype. This is kind of
+ // annoying, since json_spirit has a boost::variant inside it
+ // already, but it's not public. Oh well.
+
+ switch (it->second.type()) {
+
+ case json_spirit::obj_type:
+ default:
+ throw(runtime_error("JSON array/object not allowed " + fullcmd));
+ break;
+
+ case json_spirit::array_type:
+ {
+ // array is a vector of values. Unpack it to a vector
+ // of strings, doubles, or int64_t, the only types we handle.
+ const vector<json_spirit::mValue>& spvals = it->second.get_array();
+ if (spvals.empty()) {
+ // if an empty array is acceptable, the caller should always check for
+ // vector<string> if the expected value of "vector<int64_t>" in the
+ // cmdmap is missing.
+ (*mapp)[it->first] = vector<string>();
+ } else if (spvals.front().type() == json_spirit::str_type) {
+ vector<string> outv;
+ for (const auto& sv : spvals) {
+ if (sv.type() != json_spirit::str_type) {
+ throw(runtime_error("Can't handle arrays of multiple types"));
+ }
+ outv.push_back(sv.get_str());
+ }
+ (*mapp)[it->first] = std::move(outv);
+ } else if (spvals.front().type() == json_spirit::int_type) {
+ vector<int64_t> outv;
+ for (const auto& sv : spvals) {
+ if (spvals.front().type() != json_spirit::int_type) {
+ throw(runtime_error("Can't handle arrays of multiple types"));
+ }
+ outv.push_back(sv.get_int64());
+ }
+ (*mapp)[it->first] = std::move(outv);
+ } else if (spvals.front().type() == json_spirit::real_type) {
+ vector<double> outv;
+ for (const auto& sv : spvals) {
+ if (spvals.front().type() != json_spirit::real_type) {
+ throw(runtime_error("Can't handle arrays of multiple types"));
+ }
+ outv.push_back(sv.get_real());
+ }
+ (*mapp)[it->first] = std::move(outv);
+ } else {
+ throw(runtime_error("Can't handle arrays of types other than "
+ "int, string, or double"));
+ }
+ }
+ break;
+ case json_spirit::str_type:
+ (*mapp)[it->first] = it->second.get_str();
+ break;
+
+ case json_spirit::bool_type:
+ (*mapp)[it->first] = it->second.get_bool();
+ break;
+
+ case json_spirit::int_type:
+ (*mapp)[it->first] = it->second.get_int64();
+ break;
+
+ case json_spirit::real_type:
+ (*mapp)[it->first] = it->second.get_real();
+ break;
+ }
+ }
+ return true;
+ } catch (runtime_error &e) {
+ ss << e.what();
+ return false;
+ }
+}
+
+class stringify_visitor : public boost::static_visitor<string>
+{
+ public:
+ template <typename T>
+ string operator()(T &operand) const
+ {
+ ostringstream oss;
+ oss << operand;
+ return oss.str();
+ }
+};
+
+string
+cmd_vartype_stringify(const cmd_vartype &v)
+{
+ return boost::apply_visitor(stringify_visitor(), v);
+}
+
+
+void
+handle_bad_get(CephContext *cct, const string& k, const char *tname)
+{
+ ostringstream errstr;
+ int status;
+ const char *typestr = abi::__cxa_demangle(tname, 0, 0, &status);
+ if (status != 0)
+ typestr = tname;
+ errstr << "bad boost::get: key " << k << " is not type " << typestr;
+ lderr(cct) << errstr.str() << dendl;
+
+ ostringstream oss;
+ oss << BackTrace(1);
+ lderr(cct) << oss.rdbuf() << dendl;
+ if (status == 0)
+ free((char *)typestr);
+}
+
+long parse_pos_long(const char *s, std::ostream *pss)
+{
+ if (*s == '-' || *s == '+') {
+ if (pss)
+ *pss << "expected numerical value, got: " << s;
+ return -EINVAL;
+ }
+
+ string err;
+ long r = strict_strtol(s, 10, &err);
+ if ((r == 0) && !err.empty()) {
+ if (pss)
+ *pss << err;
+ return -1;
+ }
+ if (r < 0) {
+ if (pss)
+ *pss << "unable to parse positive integer '" << s << "'";
+ return -1;
+ }
+ return r;
+}
+
+int parse_osd_id(const char *s, std::ostream *pss)
+{
+ // osd.NNN?
+ if (strncmp(s, "osd.", 4) == 0) {
+ s += 4;
+ }
+
+ // NNN?
+ ostringstream ss;
+ long id = parse_pos_long(s, &ss);
+ if (id < 0) {
+ *pss << ss.str();
+ return id;
+ }
+ if (id > 0xffff) {
+ *pss << "osd id " << id << " is too large";
+ return -ERANGE;
+ }
+ return id;
+}
Code Review / stor4nfv.git / blobdiff